Blar i Institutt for biologi på tittel
Viser treff 1663-1682 av 2515
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Optical measurement of tissue perfusion changes as an alternative to electrocardiography for heart rate monitoring in Atlantic salmon (Salmo salar)
(Peer reviewed; Journal article, 2021)Background: Welfare challenges in salmon farming highlights the need to improve understanding of the fish’s response to its environment and rearing operations. This can be achieved by monitoring physiological responses ... -
Optimal harvesting in a changing climate
(Peer reviewed; Journal article, 2021)Choosing the right harvesting strategy is crucial for sustainable utilization of biological resources but is challenging in real systems with fluctuating environments. This challenge is expected to become even greater with ... -
Optimal Performance in the Cold
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:181, Doctoral thesis, 2012)The growth of activity in the petroleum industry and traditions of outdoor activities in the high north makes cold exposure an increasingly important factor in Scandinavia and other northern regions. The environmental ... -
Optimal physical and chemical environment for vegetative gametophyte culture of Saccharina latissima: - with emphasis on nutrient composition and light quality
(Master thesis, 2013)The production of sporelings is a bottle-neck when cultivating Saccharina latissima. Establishing a vegetative gametophyte stocks gives a constant supply of healthy sporelings, enabling a year-round cultivation independent ... -
Optimal spatiotemporal harvest strategies for willow ptarmigan (Lagopus lagopus) in central Norway
(Master thesis, 2020)The evolutionary mechanisms and environmental factors that underlie variation in movement behaviors have remained a major challenge in population ecology. This constitutes substantial issues for wildlife managers, as the ... -
Optimalisering av biologisk filtrering i MBBR for RAS-anlegg: Faktorer som påvirker filtreringsytelse og tiltak for å sikre høy vannkvalitet
(Bachelor thesis, 2023)Denne bacheloroppgaven er basert på en omfattende litteraturstudie som har til hensikt å finne ut av hvilke faktorer som påvirker biologisk filtreringsytelse i MBBR-systemer for RAS-anlegg. Målet med studien er å identifisere ... -
Optimising the frequency of clean-up actions in depositional coves in the Lofoten archipelago, Norway to maximize debris removal
(Master thesis, 2018)Marine litter is a global environmental problem which harms a vast amount of species and poses negative economic consequences. Five percent of the marine litter concentrates on the coastlines with an average concentration ... -
Optimized differentiation of THP-1 cells into macrophages for the study of TLR4 signaling and trafficking events
(Master thesis, 2014)Toll like receptors (TLRs) are a group of membrane bound pattern recognition receptors (PRRs). TLRs are able to detect a variety of pathogen associated molecular patterns (PAMPs) and start inflammation upon recognition of ... -
Optimizing carbon storage within a spatially heterogeneous upland grassland through sheep grazing management
(Journal article; Peer reviewed, 2014)Livestock grazing is known to influence carbon (C) storage in vegetation and soil. Yet, for grazing management to be used to optimize C storage, large scale investigations that take into account the typically heterogeneous ... -
Organic chemicals associated with rubber are more toxic to marine algae and bacteria than those of thermoplastics
(Peer reviewed; Journal article, 2023)The current study investigated the chemical complexity of fifty plastic (36) and elastomer/rubber (14) methanol extracts from consumer products, focusing on the association with toxicity in two screening assays (bacteria ... -
Organochlorine pollutants in grey seal (Halichoerus grypus) pups and their impact on plasma thyroid hormone and vitamin A concentrations
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:101, Doctoral thesis, 2005)Studies on laboratory animals suggest that developing and newborn mammals are more vulnerable than the adults with respect to the harmful effects of organochlorine (OC) pollutants such polychlorinated biphenyls (PCBs) and ... -
Organohalogenated contaminants (OHCs) in polar bear mother-cub pairs from Svalbard, Norway: Maternal transfer, exposure assessment and thyroid hormone disruptive effects in polar bear cubs
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:259, Doctoral thesis, 2012)As the top predator of the arctic marine food chain, polar bears (Ursus maritimus) accumulate high levels of organohalogenated compounds (OHCs) such as polychlorinated biphenyls (PCBs), brominated flame retardants (BFRs), ... -
Organohalogenated Contaminants in Eggs of Snow Buntings (Plectrophenax nivalis) from Human Settlements in Svalbard
(Master thesis, 2012)Contaminants in the Arctic environment are mainly transported from lower latitude areas by atmospheric transport. However, the Russian settlements (Barentsburg and Pyramiden) in Svalbard have shown to be heavily influenced ... -
Oriental reed warbler (Acrocephalus orientalis) nest defence behaviour towards brood parasites and nest predators
(Journal article; Peer reviewed, 2015)Brood parasites and predators pose different threats to passerines that may favour the evolution of enemy-specific defence strategies. Furthermore, potential sex-specific variation in parental investment may be manifested ... -
Ornamentation and Characteristics of the Tail in the Male Guppy
(Master thesis, 2014)Male guppies (Poecilia reticulata) show great variation in both shape and coloration of the caudal fin. In some males, an elongation of the caudal fin is present, referred to as a sword. This thesis will mainly focus on ... -
Outcomes of brood parasite-host interactions mediated by egg matching: Common cuckoos Cuculus canorus versus Fringilla finches
(Journal article; Peer reviewed, 2011)Background: Antagonistic species often interact via matching of phenotypes, and interactions between brood parasitic common cuckoos (Cuculus canorus) and their hosts constitute classic examples. The outcome of a parasitic ... -
Outside-in control - does plant cell wall integrity regulate cell cycle progression?
(Journal article; Peer reviewed, 2018)During recent years it has become accepted that plant cell walls are not inert objects surrounding all plant cells but are instead highly dynamic, plastic structures. They are involved in a large number of cell biological ... -
Ova lipid profiling and egg quality in wild and captive lumpfish, Cyclopterus lumpus (Linnaeus, 1758)
(Peer reviewed; Journal article, 2022)Lumpfish (Cyclopterus lumpus) serves an important role as cleaner fish for removing salmon lice in salmon aquaculture. For this use, cultivated lumpfish are preferred over wild-caught fish to avoid overexploitation of ... -
Oxidative status and intestinal health of gilthead sea bream (Sparus aurata) juveniles fed diets with different ARA/EPA/DHA ratios
(Peer reviewed; Journal article, 2020)The present work assessed the effects of dietary ratios of essential fatty acids, arachidonic (ARA), eicosapentaenoic (EPA) and docosahexaenoic acid (DHA), on liver and intestine oxidative status, intestinal histomorphology ... -
Oxidative stress responses in liver of A/J mice fed an environmentally relevant mixture of perfluoroalkyl substances (PFASs)
(Master thesis, 2021)Recently, the adverse effects of perfluoroalkyl substances (PFASs), have been in the spotlight of several studies. Besides the known tumour inducing and endocrine disrupting characteristics of these chemicals, there has ...